package com.zm.demo.httpclient;

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.*;
import java.util.concurrent.atomic.AtomicInteger;

public class SendMailService {
    //发件人地址
    public static String senderAddress = "zouming1@powersi.com";
    //收件人地址
    public static String recipientAddress = "zouming1@powersi.com";
    //发件人账户名
    public static String senderAccount = "zouming1@powersi.com";
    //发件人账户密码
    public static String senderPassword = "Czhy@2021";

    public static Map<String,String> emailMap = new HashMap<>();
    static {
        emailMap.put("zouming1@powersi.com", null);
        emailMap.put("345434645@qq.com", null);
    }

    public static void send(String content) throws Exception{
        //1、连接邮件服务器的参数配置
        Properties props = new Properties();
        //设置用户的认证方式
        props.setProperty("mail.smtp.auth", "true");
        //设置传输协议
        props.setProperty("mail.transport.protocol", "smtp");
        //设置发件人的SMTP服务器地址
        props.setProperty("mail.smtp.host", "mail.powersi.com.cn");
        //2、创建定义整个应用程序所需的环境信息的 Session 对象
        Session session = Session.getInstance(props);
        //设置调试信息在控制台打印出来
        session.setDebug(true);
        //3、创建邮件的实例对象
        Message msg = getMimeMessage(session, content);
        //4、根据session对象获取邮件传输对象Transport
        Transport transport = session.getTransport();
        //设置发件人的账户名和密码
        transport.connect(senderAccount, senderPassword);
        //发送邮件，并发送到所有收件人地址，message.getAllRecipients() 获取到的是在创建邮件对象时添加的所有收件人, 抄送人, 密送人
        transport.sendMessage(msg,msg.getAllRecipients());

        //如果只想发送给指定的人，可以如下写法
        //transport.sendMessage(msg, new Address[]{new InternetAddress("xxx@qq.com")});

        //5、关闭邮件连接
        transport.close();
    }
     
    /**
     * 获得创建一封邮件的实例对象
     * @param session
     * @return
     * @throws MessagingException
     * @throws AddressException
     */
    public static MimeMessage getMimeMessage(Session session, String content) throws Exception{
        //创建一封邮件的实例对象
        MimeMessage msg = new MimeMessage(session);
        //设置发件人地址
        msg.setFrom(new InternetAddress(senderAddress));
        /**
         * 设置收件人地址（可以增加多个收件人、抄送、密送），即下面这一行代码书写多行
         * MimeMessage.RecipientType.TO:发送
         * MimeMessage.RecipientType.CC：抄送
         * MimeMessage.RecipientType.BCC：密送
         */
        //zouming1@powersi.com,bing.li@powersi.com,pengchao@powersi.com,yuanzhang.zhou@powersi.com
        InternetAddress[]addresses = new InternetAddress[emailMap.size()];
        AtomicInteger i = new AtomicInteger(0);
        emailMap.entrySet().forEach(entry -> {
            try {
                addresses[i.getAndIncrement()] = new InternetAddress(entry.getKey());
            } catch (AddressException e) {
                e.printStackTrace();
            }
        });
        msg.setRecipients(MimeMessage.RecipientType.TO, addresses);
        //设置邮件主题
        msg.setSubject("监控告警","UTF-8");
        //设置邮件正文
        msg.setContent(content, "text/html;charset=UTF-8");
        //设置邮件的发送时间,默认立即发送
        msg.setSentDate(new Date());
         
        return msg;
    }
 
}